The drug is dispensed by simply squeezing a plastic bubble, giving Soré the protection she wants for three months.

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Media captionJane Dreaper speaks to Soré, who is using contraception for the first time

Thanks to the design, which is called Uniject, there is no risk of spillages or dosing errors, and because the device cannot be re-used, it cuts out the risk of infection due to needle-sharing.

The simplicity of the device means health workers can be trained more quickly too - a vital consideration for developing countries.

Kadidia Diallo, the midwife who helped Soré, says the device is more acceptable for women in rural areas.

She said: "Normally for injections you have to put them in someone's bottom, or the top of their leg, but with this - you use the arm.

"That's an advantage for women living in the bush. Many women don't come forward for injections if they have to pull their dresses up - but this is more discreet."

Injectables

In early trials women reported less pain at the injection site than with conventional jabs, too.

Image caption
Rahimata wants to become an English translator, and is keen to avoid getting pregnant and disrupting her studies.

18-year-old Rahimata Tiendrébéogo also uses the new device.

Six benefits of family planning

1. Preventing pregnancy-related health risks in women

Evidence suggests women who have more than four children have increased maternal mortality risk; avoiding unwanted pregnancies, also reduces the need for unsafe abortions.

2. Reducing infant mortality

Closely spaced and ill-timed births contribute to some of the world's highest infant mortality rates. Infants of mothers who die as a result of giving birth also have a greater risk of death and poor health.

3. Helping to prevent HIV/AIDS

Reducing the risk of unintended pregnancies among women living with HIV means fewer infected babies and orphans. Condoms also protect against STIs including HIV.

4. Empowering people and enhancing education

Informed choices about their sexual and reproductive health gives women enhanced opportunities for education and participation in public life. Children with fewer siblings tend to stay in school longer.

5. Reducing adolescent pregnancies

Pregnant teens are more likely to have preterm or low birth-weight babies, and babies born to adolescents have higher rates of neonatal mortality.

6. Slowing population growth

Unsustainable population growth results in negative impacts on the economy, environment, and national and regional development efforts.